About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Multi-Principal Element Alloys III: Mechanical Behavior
|
Presentation Title |
Negative Stacking Fault Energy in Medium to High Entropy Alloys -Its Implications |
Author(s) |
Huseyin Sehitoglu, Daegun You, Orcun Celebi, Sameer Mohammed |
On-Site Speaker (Planned) |
Huseyin Sehitoglu |
Abstract Scope |
Recent atomistic simulations on alloys with medium entropy have revealed the possibility of negative intrinsic stacking fault energies (SFEs), which imply unbounded stacking fault widths (SFWs). On the other hand, experimental measurements of SFWs in the same alloys have shown that SFWs are finite. To resolve this anomaly, we create an energy-based solution using atomistic lattice and continuum theories, which result in finite SFW solutions that correlate to negative SFEs. We illustrate the capabilities of the model to a large number of hypothetical alloys and map out contours of constant CRSS (critical resolved shear stress) including alloys with negative stacking fault energy. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Mechanical Properties, High-Entropy Alloys |